What makes the QNAP TS-264 a versatile compact NAS?

The [QNAP TS](https://www.amazon.com/s?k=QNAP+TS&tag=wehavethat-20)-264 fits two SATA bays plus two M.2 2280 NVMe PCIe Gen 3 x2 slots into a compact 2-bay chassis. The NVMe slots work for caching or storage, enabling a surprisingly fast compact setup. The x2 lane width per slot is a mild limitation, but for a 2-bay unit this is impressive flexibility.